Mount Rainier volcano hazards and lahar arrival times in Puyallup and Nisqually River valleys

Mount Rainier (Washington) volcano hazard zones and estimated lahar (volcanic mudflow) arrival times for the Puyallup and Nisqually River valleys. Lahar arrival times derived from computer simulations described in Modeling the Dynamics of Lahars that Originate as Landslides on the West Side of Mount Rainier, Washington, USGS Open-File Report 2021-1118, https://doi.org/10.3133/ofr20211118. Lahars may be larger or small than depicted and arrival times will vary during an actual lahar.